I have a deployment which includes a configMap, persistentVolumeClaim, and a service. I have changed the configMap and re-applied the deployment to my cluster. I understand that this change does not automatically restart the pod in the deployment:

configmap change doesn't reflect automatically on respective pods

Updated configMap.yaml but it's not being applied to Kubernetes pods

I know that I can kubectl delete -f wiki.yaml && kubectl apply -f wiki.yaml. But that destroys the persistent volume which has data I want to survive the restart. How can I restart the pod in a way that keeps the existing volume?

Here's what wiki.yaml looks like:

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: dot-wiki
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 4Gi
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: wiki-config
data:
  config.json: |
    {
      "farm": true,
      "security_type": "friends",
      "secure_cookie": false,
      "allowed": "*"
    }
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: wiki-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: wiki
  template:
    metadata:
      labels:
        app: wiki
    spec:
      securityContext:
        runAsUser: 1000
        runAsGroup: 1000
        fsGroup: 1000
      initContainers:
      - name: wiki-config
        image: dobbs/farm:restrict-new-wiki
        securityContext:
          runAsUser: 0
          runAsGroup: 0
          allowPrivilegeEscalation: false
        volumeMounts:
          - name: dot-wiki
            mountPath: /home/node/.wiki
        command: ["chown", "-R", "1000:1000", "/home/node/.wiki"]
      containers:
      - name: farm
        image: dobbs/farm:restrict-new-wiki
        command: [
          "wiki", "--config", "/etc/config/config.json",
          "--admin", "bad password but memorable",
          "--cookieSecret", "any-random-string-will-do-the-trick"]
        ports:
        - containerPort: 3000
        volumeMounts:
          - name: dot-wiki
            mountPath: /home/node/.wiki
          - name: config-templates
            mountPath: /etc/config
      volumes:
      - name: dot-wiki
        persistentVolumeClaim:
          claimName: dot-wiki
      - name: config-templates
        configMap:
          name: wiki-config
---
apiVersion: v1
kind: Service
metadata:
  name: wiki-service
spec:
  ports:
  - name: http
    targetPort: 3000
    port: 80
  selector:
    app: wiki